2194661533 has 2 divisors, whose sum is σ = 2194661534. Its totient is φ = 2194661532.

The previous prime is 2194661509. The next prime is 2194661543. The reversal of 2194661533 is 3351664912.

2194661533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2164389529 + 30272004 = 46523^2 + 5502^2 .

It is a cyclic number.

It is not a de Polignac number, because 2194661533 - 2⁵ = 2194661501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2194661543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1097330766 + 1097330767.

It is an arithmetic number, because the mean of its divisors is an integer number (1097330767).

Almost surely, 2^2194661533 is an apocalyptic number.

It is an amenable number.

2194661533 is a deficient number, since it is larger than the sum of its proper divisors (1).

2194661533 is an equidigital number, since it uses as much as digits as its factorization.

2194661533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The square root of 2194661533 is about 46847.2147838055. The cubic root of 2194661533 is about 1299.5386001633.

The spelling of 2194661533 in words is "two billion, one hundred ninety-four million, six hundred sixty-one thousand, five hundred thirty-three".